Quick-acting pump coupling



March 24; 1925.

M. c. SCHWEINERT QUICK ACTING PUMP COUPLING Filed Oct, 9, 1920 Patented 24, 1925.

UNITED STATES PATENT OFFICE.

MAXIMILIAN CHARLES sonwnrnnnr, on NEW YORK, n. y.

. QUICK-ACTING PUMP COUPLING.

Application filed October 9, 1920. Serial No. 415,884.

To a-ZZ whom it may concern:

Be it known that I, MAXIMILIAN CHARLES Sonwninnn'r, a citizen of the United States of iamerica, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and use ful. Improvements in Quick-Acting Pump Couplings, of which the following is a specification.

This invention relates to pump coupling or the like and aims to provide certain impmvements therein. i

The invention is particularly directed to that type of coupling which has a mutilated thread which is adapted to be slipped over the end of the valve casing in a position wherein the coupling is displaced from its final position to a sufficient extent to enable the threads of the valve casing to pass the threads on the coupling. It has heretofore been proposed to provide a coupling of this type in which the coupling is canted or tilted with relation tothe valve casing until it assumes approximately its innermost position whereupon it is straightened in line with the valve casing and the threads thus engaged. In such types of couplings there have been no means provided for holding the coupling in its finally adjusted or working position. Consequently it is liable to cant back into its removable position particularly before pressure is appliedf When the pressure of air is upon the coupling, such disengagement is less likely sincepressure tends to hold the deviceinits engaged position. o

According to the present invention I provide a positive means for holding the coupling in such position irrespective of conditions of pressure. To this end I provide a coupling having a mutilated thread so constructed as to be applied to the valve casing with the mutilated thread in engagement therewith, and a movable member preferably of rotary construction which holds the-parts so that escape of the coupling thread and valve thread is impossible without manual adjustment.

Referring to the drawings which illustrate several forms of the invention.

Figure 1 is an elevation of one form of coupling as applied to a valve casing;

Fig. 2 is a diametrical section of the coupling removed, and on an enlarged scale;

Fig. 3 is a bottom view of the coupling;

Fig. 4: is a bottom view of the coupling wvith the manipulating member removed; Fig. 5 is a diametrical section of the coupling nut;

Fig, 6 is an elevation of the actuating sleeve;

Fig. 7 is a bottom view of the same;-

Fig. 8 is a diametric-al section of a nioditied construction; i

Fig. 9 is a bottom View of' a modification;

Fig. 10 is a similar v'iew showing the parts in different relative: positions.

Referring to the drawings, Aindicates the coupling as a whole, which, as shown in Fig. 1, is applied tothe valve casing B.

' The coupling A comprises a body portion C having an internal bore I) which contains a packing E preferably of the piston type. F is a nut having mutilated thread G which preferably is formed separately from the body of the coupling, the mutilated thread being on. one side of the nut and adapted to engage the nipple on the valve casing, as is best shownin Fig. 8.

In the type of Tcoupling shown inFigs. 1 to 7,.the nut has a cut-away portion H into which the valve nipple may be in troduced when in canted position, and upon straightening the mutilated thread G is brought into engagement with the thread of. the valve casing.

According to the present invention I provide means for holdin the parts in engaged position, such means being preferably adjustable by hand and preferably comprising a rotary member I which in the construction shown as a flange J for swiveling it to the body of the coupling. The holdingmember I has a bottom flange K which isrecessed at L so that when the member is in position of 2 it does not interfere with the application. of the coupling to the valve. On the other hand when the member is turned half circle the edgeof the recess L engages the opposite side of the valve nipple and prenipple without canting it, the nipple passing into the coupling in a substantially axial position. The holding member I in this construction acts also to cam the coupling side-wise so as to throw the valvenipple into engagement with the mutilated thread G. The construction of holding member for this purpose is best illustrated in F 9 and 10. The flange K has a cammingcorner or surface P which engages the valve nipple, as the holding member is turned and moves the coupling laterally until the thread is engaged. F i g. 10 shows the valve nipple when first inserted and lying over to the left with the threads disengaged. Fig. 9 shows the position of the parts after the holding member has been turned to cam the coupling to the left, thus bringing the nipple into engagement with the mutilated thread G.

The device is preferably provided with some construction of packing washer which will make tight joint with the coupling under pressure. The packing E is of this type. Preferably the wall of the coupling is cut away at Q so as to admit pressure to the back of the packing and the packing is moved downwardly under v the pressure against the end of thevalve nipple, as indicated, for instance, in Fig. 8.

lVhile I have shown and described several forms of the invention, it will be understood that I do not wish to be limited thereto since various changes may be made therein without departing from the spirit of the invention.

What I-claim is 7 I l. A pump coupling or the like, having an imperforate bore adapted to receive the end. of a alve casing, a part of the coupling having a mutilated thread and a part of the coupling having means to hold the valve casing in engagement with said thread, and one of said parts being movable about the axis of the body portion with relation to the other whereby in one position the valve may be inserted and removed without resorting to a threading or unthreading operation, and

in anotherposition the coupling may be locked in engagement with the valve.

'2. A'pump coupling or the like, having a mutilated thread and an enlarged opening adapted to permit the entrance of a valve, and the pump coupling adapted by a lateral movement to engage the thread of the coupling with the thread of the valve, and a rotary means movable about the axis of the coupling and adapted to bear against the valve to prevent the disengagementof said threads. p

3. A pump coupling or the like, having a mutilated thread and an enlarged opening adapted to permit the entrance of a valve, and the pump coupling adapted by a lateral movement to engage thethread of the cou pling with the thread of'the valve, and a. rotary means adapted to bear against the valve to prevent the disengagementof said.

threads, said means comprising a collar swivelled to the couplin'g,said collar adapted in one position tO'PQIHIlt insertion of the valve and in'another position to prevent-its withdrawal; v J

4. A pump coupling or the like, having a borev provided with a mutilated thread, the opposite side of said here being bevelled to permit the entrance of a valve casing when tilted with relation to the couplin and means for holding the coupling with its threads engaging those of thevalve casing, and said means comprising a collar swivelled to the coupling and adapted to bear against the side of the valve casing.

In witnesswhereof, I have hereunto signed my name. I

MAXIMILIAN CHARLES SCHWEINERT. 

